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If an airplane is moving at velocity v , the drag D (in N ) on the plane isD=av 2 +b/v 2 , where a=5.40x10

If an airplane is moving at velocityv, the dragD(inN) on the plane isD=av2+b/v2, where a=5.40x10-3and b=3.09x108. Find the value(s) ofv

(in km/h), for which the drag is the least. Round the answer to one decimal place.

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